Lesson plan
Parallel (engineering)
and a workpiece A parallel is a rectangular block of metal, commonly made from tool steel, stainless steel or cast iron, which has 2, 4 or 6 faces ground or lapped to a precise surface finish. Parallels are used when machining with a mill, drill or any other machining operation that requires work to be held in a vise or with clamps - to keep work parallel or raised evenly such as in a milling vise to give adequate height for the cutting tool/spindle to pass over. Related are 1-2-3 blocks which are also used for setup.
Article summary
and a workpiece A parallel is a rectangular block of metal, commonly made from tool steel, stainless steel or cast iron, which has 2, 4 or 6 faces ground or lapped to a precise surface finish. Parallels are used when machining with a mill, drill or any other machining operation that requires work to be held in a vise or with clamps - to keep work parallel or raised evenly such as in a milling vise to give adequate height for the cutting tool/spindle to pass over. Related are 1-2-3 blocks which are also used for setup.
Key claims
No claims recorded.
Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
Bibliography
No sources recorded.
Key claims and bibliography are generated from the same tracked claims and sources as the article page.